Bolt



FIG. 1 is a front elevation of a bolt;

FIG. 2 is a left side elevation of the same;

FIG. 3 is a right side elevation of the same;

FIG. 4 is a rear elevation of the same;

FIG. 5 is a top plan view of the same;

FIG. 6 is a bottom plan view of the same.

The ornamental design for "a bolt," is substantially as shown.